withTypeMappings not working

[tqwewe]

Description

If I create a client with the following:

this.client = createClient({
  url: this.url,
})
.withTypeMapping({
  [RESP_TYPES.BLOB_STRING]: Buffer
});

And execute a command:

await this.client.sendCommand(['MYCOMMAND']);

The provided type mappings aren't being respected.

If I put a log under the opts here:

node-redis/packages/client/lib/client/index.ts

Lines 918 to 921 in 746e9b1

	const opts = {
	...this._self._commandOptions,
	...options
	}

I see the options are {}, despite assigning type mappings. One hotfix was to change ...this._self._commandOptions, to ...this._commandOptions,.

This has drained a lot of hours due to my returned data not being interpreted as binary correctly.

Node.js Version

v22.17.0

Redis Server Version

Using a custom database

Node Redis Version

redis@5.8.1

Platform

Linux

Logs

[PavelPashov]

Hey @tqwewe, thanks for reporting this. We’ll look into the best way to address it. In the meantime, check if this workaround works for you:

 await this.client.sendCommand(['MYCOMMAND'], {
    typeMapping: {
      [RESP_TYPES.BLOB_STRING]: Buffer,
    }
  });